Erlend Haarberg / Stoat (Mustela erminea) in white winter coat. Vauldalen, Sor-Trondelag, Norway, April.

Erlend Haarberg / Stoat (Mustela erminea) in white winter coat, standing on hind legs, Vauldalen, Sor-Trondelag, Norway, April.

Bruno D'Amicis / Apennine chamois (Rupicapra pyrenaica ornata) adult male. Endemic to the Apennine mountains. Abruzzo, Italy, December.

Edwin Giesbers / Wide angle close-up of two European grey wolves (Canis lupus), captive, Norway, February.

Pal Hermansen / Blue tit (Cyanistes caeruleus) taking off in the snow, with old cars in the background, Bastnas, Sweden, February. Winner of the Fritz Polking Prize at the GDT competition 2013 and winner of the Portf...

Theo Bosboom / Dead Angelica (Angelica sp) in the snow, Skaftafell, Vatnajokull National Park, Iceland, February

Theo Bosboom / Conifer trees in snowy landscape, near Baraque Michel, Belgian Ardennes, January 2010

Ben Cranke / Snow Leopard (Uncia uncia) walking down snow covered slope, Hemas National Park, Ladakh, India

Paul Harcourt Davies / Spring Crocus (Crocus vernus) in flower in snow, Campo Imperatore, Gran Sasso, Appennines, Abruzzo, Italy, May

Igor Shpilenok / Red Fox (Vulpes vulpes) portrait, resting on snow. Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Far East, March.

Danny Green / Great Grey owl (Strix nebulosa) taking off from the ground in snow, Finland, April. Bookplate from Danny Green's 'The Long Journey North'

Andy Trowbridge / Roe deer (Capreolus capreolus) female leaping in snow, Southern Norway, March.